﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.ComponentModel;

namespace SilverlightSdms
{

    public delegate void IsUserAuthorizedChangedEventHandler(object sender, EventArgs e);

    public enum eRoleType
    {
        Administrator = 1,
        Doctor,
        TeamLeader,
        FSM
    }

    public partial class App : Application
    {
        public event IsUserAuthorizedChangedEventHandler IsUserAuthorizedChanged;

        private bool m_IsUserAuthorized = false;
        private List<eRoleType> m_RoleTypes = new List<eRoleType>();

        public bool IsUserAuthorized
        {
            get { return m_IsUserAuthorized; }
            private set 
            { 
                m_IsUserAuthorized = value;
                onIsUserAuthorizedChanged(new EventArgs());
            }
        }

        public int UserId { get; set; }

        public List<eRoleType> RoleTypes 
        {
            get { return m_RoleTypes; }
        }

        public App()
        {
            this.Startup += this.Application_Startup;
            this.UnhandledException += this.Application_UnhandledException;
            InitializeComponent();
        }

        #region Private

        private void Application_Startup(object sender, StartupEventArgs e)
        {
            this.RootVisual = new MainPage();
        }

        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            // If the app is running outside of the debugger then report the exception using
            // a ChildWindow control.
            if (!System.Diagnostics.Debugger.IsAttached)
            {
                // NOTE: This will allow the application to continue running after an exception has been thrown
                // but not handled. 
                // For production applications this error handling should be replaced with something that will 
                // report the error to the website and stop the application.
                e.Handled = true;
                ChildWindow errorWin = new ErrorWindow(e.ExceptionObject);
                errorWin.Show();
            }
        }

        #endregion

        #region Public

        public void AddRoleType(string RoleType)
        {
            eRoleType newRole;
            bool isRoleValid = Enum.TryParse<eRoleType>(RoleType, out newRole);

            if (isRoleValid && !m_RoleTypes.Contains(newRole))
            {
                m_RoleTypes.Add(newRole);
                IsUserAuthorized = true;
            }
        }

        public void AddRoleType(List<string> RoleTypes)
        {
            foreach (var roleType in RoleTypes)
            {
                AddRoleType(roleType);
            }
        }

        #endregion

        #region Protected

        protected virtual void onIsUserAuthorizedChanged(EventArgs e)
        {
            if (IsUserAuthorizedChanged != null)
            {
                IsUserAuthorizedChanged.Invoke(this, e);
            }
        }
        
        #endregion
    }
}